
/*
 * Copyright 2011 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
#include "SampleCode.h"
#include "SkCanvas.h"
#include "SkPaint.h"
#include "SkGpuDevice.h"

static void make_bitmap(SkBitmap* bitmap, GrContext* ctx, SkIRect* center)
    {
    SkDevice* dev;
    SkCanvas canvas;

    const int kFixed = 28;
    const int kStretchy = 8;
    const int kSize = 2*kFixed + kStretchy;

    if (ctx)
        {
        dev = new SkGpuDevice(ctx, SkBitmap::kARGB_8888_Config, kSize, kSize);
        *bitmap = dev->accessBitmap(false);
        }
    else
        {
        bitmap->setConfig(SkBitmap::kARGB_8888_Config, kSize, kSize);
        bitmap->allocPixels();
        dev = new SkDevice(*bitmap);
        }

    canvas.setDevice(dev)->unref();
    canvas.clear(0);

    SkRect r = SkRect::MakeWH(SkIntToScalar(kSize), SkIntToScalar(kSize));
    const SkScalar strokeWidth = SkIntToScalar(6);
    const SkScalar radius = SkIntToScalar(kFixed) - strokeWidth/2;

    center->setXYWH(kFixed, kFixed, kStretchy, kStretchy);

    SkPaint paint;
    paint.setAntiAlias(true);

    paint.setColor(0xFFFF0000);
    canvas.drawRoundRect(r, radius, radius, paint);
    r.setXYWH(SkIntToScalar(kFixed), 0, SkIntToScalar(kStretchy), SkIntToScalar(kSize));
    paint.setColor(0x8800FF00);
    canvas.drawRect(r, paint);
    r.setXYWH(0, SkIntToScalar(kFixed), SkIntToScalar(kSize), SkIntToScalar(kStretchy));
    paint.setColor(0x880000FF);
    canvas.drawRect(r, paint);
    }


class NinePatchView : public SampleView
    {
    public:
        NinePatchView() {}

    protected:
        // overrides from SkEventSink
        virtual bool onQuery(SkEvent* evt)
            {
            if (SampleCode::TitleQ(*evt))
                {
                SampleCode::TitleR(evt, "NinePatch");
                return true;
                }
            return this->INHERITED::onQuery(evt);
            }

        virtual void onDrawContent(SkCanvas* canvas)
            {
            SkBitmap bm;
            SkIRect center;
            make_bitmap(&bm, SampleCode::GetGr(), &center);

            // amount of bm that should not be stretched (unless we have to)
            const SkScalar fixed = SkIntToScalar(bm.width() - center.width());

            const SkTSize<SkScalar> size[] =
                {
                    { fixed * 4 / 5, fixed * 4 / 5 },   // shrink in both axes
                    { fixed * 4 / 5, fixed * 4 },       // shrink in X
                    { fixed * 4,     fixed * 4 / 5 },   // shrink in Y
                    { fixed * 4,     fixed * 4 }
                };

            canvas->drawBitmap(bm, SkIntToScalar(10), SkIntToScalar(10), NULL);

            SkScalar x = SkIntToScalar(100);
            SkScalar y = SkIntToScalar(100);

            SkPaint paint;
            paint.setFilterBitmap(true);

            for (int iy = 0; iy < 2; ++iy)
                {
                for (int ix = 0; ix < 2; ++ix)
                    {
                    int i = ix * 2 + iy;
                    SkRect r = SkRect::MakeXYWH(x + ix * fixed, y + iy * fixed,
                                                size[i].width(), size[i].height());
                    canvas->drawBitmapNine(bm, center, r, &paint);
                    }
                }
            }

    private:
        SkScalar fX, fY;
        typedef SampleView INHERITED;
    };

//////////////////////////////////////////////////////////////////////////////

static SkView* MyFactory()
    {
    return new NinePatchView;
    }
static SkViewRegister reg(MyFactory);

